57291457 has 2 divisors, whose sum is σ = 57291458. Its totient is φ = 57291456.

The previous prime is 57291427. The next prime is 57291461. The reversal of 57291457 is 75419275.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43086096 + 14205361 = 6564^2 + 3769^2 .

It is a cyclic number.

It is not a de Polignac number, because 57291457 - 2⁷ = 57291329 is a prime.

It is a super-2 number, since 2×57291457² = 6564622090365698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (57291427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28645728 + 28645729.

It is an arithmetic number, because the mean of its divisors is an integer number (28645729).

Almost surely, 2^57291457 is an apocalyptic number.

It is an amenable number.

57291457 is a deficient number, since it is larger than the sum of its proper divisors (1).

57291457 is an equidigital number, since it uses as much as digits as its factorization.

57291457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 88200, while the sum is 40.

The square root of 57291457 is about 7569.1120351069. The cubic root of 57291457 is about 385.5049471614.

It can be divided in two parts, 572 and 91457, that added together give a palindrome (92029).

The spelling of 57291457 in words is "fifty-seven million, two hundred ninety-one thousand, four hundred fifty-seven".